/**
 * Copyright Sp42 frank@ajaxjs.com
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.ajaxjs.web.view;

import com.ajaxjs.util.date.DateUtil;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.SimpleTagSupport;
import java.io.IOException;
import java.util.Date;


/**
 * 格式化日期的标签
 *
 * @author sp42 frank@ajaxjs.com
 */
public class DateUtilTag extends SimpleTagSupport {
    /**
     * 输入的值，可以是任意类型，要经过转换。
     */
    private Object value;

    /**
     * 格式化模版，如果为 null，则默认为 采用格式 YYYY-MM-dd HH:MM
     */
    private String format;

    @Override
    public void doTag() throws JspException, IOException {
        if (value == null)
            return;

        Date date = DateUtil.object2Date(value);

        if (date == null)
            return;

        String format = this.format == null ? DateUtil.formatDateShorter(date) : DateUtil.simpleDateFormatFactory(this.format).format(date);

        getJspContext().getOut().write(format);
    }

    public void setValue(Object value) {
        this.value = value;
    }

    public String getFormat() {
        return format;
    }

    public void setFormat(String format) {
        this.format = format;
    }
}